Speed-regulator.



No. 664,026. Patented Dec. l8, I900.

L. H. NASH. v

SPEED REGULATOR.

(Appl 6 man 6 18991 2 SheetsSheet (No Model.)

WITNESSES:

' No. 664,026. Patented Dec. l8, I900.

L. NASH. SPEE GULATDB. (Application filed. Mar. 6, 1899.)

(No Model.) 2 Shaets8heet 2.

INVENTOR WITNESSES:

QM aw 0". AT NEY S.

THE NORRiS PETERS co. FHOTO-LYTHQAVASHINGYUN: n. c.

UNITED STATES PATENT OFFICE.

LEWIS HALLOOK NASH, OF SOUTH NORWAIIK, CONNECTICUT.

SPEED-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 664,026, dated December18, 1900.

Application filed March 6, 1899.

To all whom it may concern:

Be it known that I, LEwIs HALLOOK NASH, a citizen of the United States,and a resident of South Norwalk, in the county of Fairtield and State ofConnecticut, have invented certain new and useful Improvements inSpeed-Regulators,of which the fcllowingis a specification.

My present invention relates to speed-regulators; and it consists ofcertain novel parts and combinations of parts, particularly pointed outin the concluding claims.

In the accompanying drawings Ihave shown my invention applied in theform which is at present preferred by me; but it will be understood thatvarious modifications and changes may be made Without departing from thespirit of my invention and without exceeding the scope of the concludingclaims.

Referring to the drawings, Figure l is a side view of a speed-regulatorinvolving my invention; and Fig. 2 is a cross-section on the line 2 2,Fig. 1. Fig. 3 shows in sectional detail the relation of the pivots ofthe shoe and of its pivoted support.

The following is a description of the structure shown in the drawings,illustrating the embodiment of my invention at present preferred.

3 is the engineshaft, and t the drivingwheel.

5 is the shaft of the driven mechanism, which in this case we willassume to be a dynamo.

6 is the driven wheel.

7 '7 7 are friction-shoes (preferably faced with leather) by means ofwhich the energy of the shaft 3 is communicated to the shaft 5.

8 8 8 are levers supported on pivots 9 9 9, carried by driven wheel 6,to which leverarms the shoes 7 7 7 are pivoted.

1O 10 10 are the weighted ends of the arms 8 8 8.

11 11 ll are springs at one end attached to the spokes of the drivenwheel 6 by adjustable nuts and at the other end attached to the arms 8.

The operation of the device is as follows: The speed of the wheel 4,driven by the engine, is more or less variable, and the object is tomaintain the speed of the driven wheel 6 more nearly invariable. Thecoiled springs 11 constantly tend to press the shoes 7, carried on thedriven wheel, against the inner rim of the driving-wheel. By thesefrictionshoes the power is transmitted from one wheel Serial No.708,006. (No model.)

to the other. When, however, the driven wheel exceeds the normalpredetermined speed, the centrifugal force of the weights 10 (or thelever ends without weights) overcomes the elasticity of the springs andwithdraws the shoes from contact with the driven wheel or diminishessuch friction-contact, permitting the driving-wheel to exceed the speedof the driven wheel. In this construction the energy of the springs andthe levers controlled by centrifugal force constantly oppose each other.While the energy of the spring is substantially constant, thecentrifugal force varies with the speed, and the shoes are controlled bythe difference between the two. As the wheels revolve in the directionof the arrow 12 all tendency to jam is avoided, since friction tends torelease the shoe and not to clamp it.

Having thus described the structure which in the form at present shownembodies my invention, what I claim, and desire to secure by LettersPatent, is

1. In a speed-regulator, the combination of rotative driving and drivenmembers adapted to be connected to rotate in unison respectively withthe motor and the mechanism being driven, levers pivoted upon saiddriven member, shoes carried by said levers and adapted to frictionallyengage the driving member, and springs connected with said levers andproportioned to neutralize the centrifugal force developed in saidlevers at the desired speed, and to swing the levers in opposition tothe centrifugal force and so as to apply the shoes at lower speeds andin the opposite direction to free the shoes at higher speeds.

2. In a speed-regulator the combination with a driving and a drivenwheel, mounted upon coincident axes, the-driving-wheel having afriction-surface thereon, of levers pivoted near one end to the drivenwheel, shoes carried on the short arms of the levers and adapted toengage the friction-surface upon the driving-wheel, the short arms ofthe levers extending with the direction of slip of the driving-wheelupon the shoe, and springs acting in opposition to centrifugal forceupon said levers.

LE WIS HALLOOK NASH.

"Witnesses:

JOHN H. NORRIS, HARRY T. WooLsoN.

IOO

